CN211039895U

CN211039895U - Electric valve

Info

Publication number: CN211039895U
Application number: CN201921676861.6U
Authority: CN
Inventors: 不公告发明人
Original assignee: Hangzhou Sanhua Research Institute Co Ltd
Current assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Priority date: 2019-10-09
Filing date: 2019-10-09
Publication date: 2020-07-17
Anticipated expiration: 2029-10-09

Abstract

An electric valve comprises a first sensor and a position detection sensor, wherein the first sensor can detect the temperature and/or the pressure of a working medium in a second cavity, the position detection sensor can sense the rotation of a rotor and obtain a feedback signal, and a control unit on an electric control board collects the feedback signal and judges the running state of the electric valve by combining the feedback signal; therefore, the electric valve can obtain the temperature and/or pressure of the working medium in the second cavity and the feedback signal of the rotor state, the control precision of the electric valve is favorably improved, and the reliability of the system is favorably improved.

Description

Electric valve

Technical Field

The utility model relates to a fluid control technical field, in particular to motorised valve.

Background

In a refrigeration system, an electric valve is mainly used for adjusting the flow rate of refrigerant. With the improvement of the requirement on the flow control accuracy, the electrically operated valve is gradually applied to an automobile air conditioning system, a heat pump system and a battery cooling system. Therefore, how to improve the control accuracy of the electric valve is a technical problem to be considered in the design process.

SUMMERY OF THE UTILITY MODEL

The application aims to provide an electric valve which is beneficial to improving the control precision. In order to achieve the above object, the present invention adopts the following technical solutions:

an electric valve comprises a valve body, a valve seat assembly, a valve core, a rotor assembly, a stator assembly, an injection molding part and an electric control plate, wherein the injection molding part is provided with a cavity, the electric control plate is positioned in the cavity of the injection molding part, the valve seat assembly is provided with a valve port, the rotor assembly comprises a rotor, the stator assembly is positioned at the periphery of the rotor assembly, the stator assembly is electrically connected with the electric control plate, the rotor assembly can drive the valve core to move, the valve core can move relative to the valve port and adjust the opening degree of the valve port, the valve body is provided with a first cavity, at least part of the valve seat assembly is positioned in the first cavity, the electric valve further comprises a first sensor, the valve body is also provided with a second cavity, at least part of the first sensor is positioned in the second cavity, the first sensor is positioned at one side of the electric control plate close to the valve body, the first sensor can detect the temperature and/or the pressure of the working medium in the second cavity, the electric valve further comprises a position detection device, the position detection device is located on the outer side of the rotor in the radial direction and is limited by the injection molding part, the position detection device comprises a position detection sensor, the position detection sensor can sense the rotation of the rotor and obtain a feedback signal, and a control unit on the electric control board collects the feedback signal and judges the running state of the electric valve by combining the feedback signal.

In the technical scheme, the electric valve comprises a first sensor and a position detection sensor, the first sensor can detect the temperature and/or the pressure of a working medium in the second cavity, the position detection sensor can sense the rotation of the rotor and obtain a feedback signal, and a control unit on the electric control board acquires the feedback signal and judges the running state of the electric valve by combining the feedback signal; therefore, the electric valve can obtain the temperature and/or pressure of the working medium in the second cavity and the feedback signal of the rotor state, and the control precision of the electric valve is improved.

Drawings

Figure 1 is a schematic structural view of a first embodiment of an electric valve;

figure 2 is a schematic cross-sectional view of the electrically operated valve of figure 1;

figure 3 is a schematic cross-sectional view of the electrically operated valve of figure 1;

figure 4 is a schematic view of the combination of the injection part, the electric control plate, the connecting member and the position detecting device in the electric valve of figure 1;

FIG. 5 is another schematic diagram of the injection molding portion, the electric control plate, the connecting member and the position detecting device of the electric valve of FIG. 1;

FIG. 6 is a schematic view of the combination of the injection molding part, the electric control board and the position detecting device shown in FIG. 5;

FIG. 7 is a schematic view of the combination of the injection molding part and the electric control board in FIG. 6;

FIG. 8 is an enlarged partial view of the portion A of FIG. 7;

FIG. 9 is a perspective view of the connector of FIG. 4;

figure 10 is a schematic view of the position detecting sensor and the fixing portion combined in one embodiment of the electric valve;

figure 11 is a schematic view of the fixing portion of an embodiment of the electric valve;

figure 12 is a schematic diagram of the structure of a position detection sensor in an embodiment of an electrically operated valve;

figure 13 is a schematic view of the injection part, the electric control plate, the connecting member and the position detecting device combination of the second embodiment of the electric valve;

FIG. 14 is a schematic view showing a structure of a combination of an injection molding part, an electric control plate, a connecting member and a position detecting device in a third embodiment of an electric valve;

figure 15 is a schematic cross-sectional view of a fourth embodiment of an electrically operated valve;

FIG. 16 is a schematic view of the combination of the injection molding part, the electric control plate and the position detecting device in the electric valve of FIG. 15;

figure 17 is a schematic cross-sectional view of a fifth embodiment of an electrically operated valve;

figure 18 is a schematic perspective view of a perspective view of the valve body of the electrically operated valve of figure 1;

FIG. 19 is a cross-sectional structural view of the valve body of FIG. 18;

figure 20 is a schematic perspective view of a first sensor in an embodiment of an electrically operated valve.

DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION

The invention will be further explained with reference to the drawings and the detailed description below:

with reference to fig. 1 to fig. 2, the electric valve 100 includes a valve body 1, a valve seat assembly 2, a valve core 3, a rotor assembly 41, a stator assembly 42, and an electric control board 5, wherein the rotor assembly 41 includes a rotor 411, the valve seat assembly 2 has a valve port 21, and the stator assembly 42 is located at an outer periphery of the rotor assembly 41; the electric valve further comprises a sleeve 101, the sleeve 101 being located between the stator assembly 42 and the rotor assembly 41. The stator assembly 42 is electrically and/or signal connected with the electric control board 5; when the electric valve works, the electric current in the winding of the stator assembly 42 is controlled to change according to a preset rule, so that the stator assembly 42 is controlled to generate a changed excitation magnetic field, the rotor assembly 41 rotates under the action of the excitation magnetic field, and the rotor assembly 41 can drive the valve core 3 to move relative to the valve seat 21 and adjust the opening degree of the valve port 211. Of course, in other embodiments, the valve port may be formed in the valve body.

The electric valve further comprises an injection molding part 6, and the injection molding part 6 is positioned above the valve body 1. The injection molding part 6 is provided with a cavity, the electric control plate 5 is positioned in the cavity of the injection molding part 6, and the electric control plate 5 is provided with a control unit.

With reference to fig. 1 to 2 and 18 to 20, the valve body 1 includes a first chamber 11 and a first flow passage 12, the first flow passage 12 is capable of flowing a working medium, the first chamber 11 is communicated with the first flow passage 12, and at least a part of the valve seat assembly 2 is located in the first chamber 11. The valve body 1 further comprises a second chamber 13 and a second flow passage 14, the second chamber 13 communicating with the second flow passage 14. In this embodiment, the electrically operated valve further includes a first sensor 7, at least a portion of the first sensor 7 is located in the second cavity 13, the first sensor 7 is located below the electrical control board 5, the first sensor 7 is electrically and/or signally connected to the electrical control board 5, the first sensor 7 can detect parameters such as temperature and/or pressure of the working medium in the second cavity 13 or the second channel 14, and further feed the parameters back to the electrical control board 5, and the opening degree of the electrically operated valve is adjusted by combining a signal fed back by the first sensor 7 and a corresponding control program. The first sensor 7 comprises a body 71, a sensing head 72 and a first abutting part 73, the sensing head 72 is fixedly arranged with the body 71, the first abutting part 73 is electrically and/or signal-connected with an internal circuit of the first sensor, the first abutting part 73 is in contact with and electrically connected with the electric control board 5, of course, the first sensor 7 and the electric control board 5 can be connected by other methods, including welding; referring to fig. 2, at least a portion of the sensing head 72 is located in the second cavity 13 or the second flow channel 14, and the sensing head 72 can sense parameters such as temperature and/or pressure of the working medium in the second cavity 13 or the second flow channel 14 and feed back the parameters to the control unit on the electronic control board 5.

With reference to fig. 3, 10-12, the electrically operated valve further includes a position detection device 8, the position detection device 8 includes a position detection sensor 81, the position detection sensor can sense the rotation of the rotor and obtain a feedback signal, a control unit on the electrical control board collects the feedback signal and determines the operation state of the electrically operated valve according to the feedback signal, and the position detection device 8 is limited by the injection molding part 6. In the present embodiment, the position detection sensor 81 is a hall sensor, and the position detection sensor 81 may be a position sensor. The rotor 411 at least comprises a pair of magnetic poles, each pair of magnetic poles respectively comprises an N pole and an S pole, the N pole and the S poles are distributed at intervals along the circumferential direction of the rotor 411, the position detection sensor 81 senses the change of the magnetic poles on the rotor 411 and obtains a feedback signal, the control unit on the electric control board 5 collects the feedback signal and judges the running state of the electric valve by combining the feedback signal, corresponding countermeasures are taken, and the running state of the electric valve comprises normal running, locked rotor and step loss.

Referring to fig. 10 to 12, in the present embodiment, the position detection sensor 81 includes a body portion 811 and a first set of pins 812; in order to improve the connection reliability of the position detection sensor 81, in the present embodiment, the electric valve further includes a fixing portion 82, and the fixing portion 82 is used for mounting the position detection sensor 81; the fixing portion 82 includes a fixing portion main body 821, a mounting groove 822, a through hole 823, and a stopper column 824; the main body 811 of the position detection sensor 81 is accommodated in the mounting groove 822, the main body 811 of the position detection sensor 81 is in close fit with the inner wall of the fixing portion main body 821, and the first group pins 812 pass through the through holes 823. Of course, in other embodiments, the position detection sensor may be in a patch form, the fixing portion is the adapting circuit board, the position detection sensor is fixed on the adapting circuit board by welding, and the fixing portion is fixed with the electric control board by welding or clamping.

With reference to fig. 1 to 9, in this embodiment, the injection molding part 6 is detachably connected to the valve body 1, a sealing ring is further disposed between the injection molding part 6 and the valve body 5 for sealing, the injection molding part 6 is fixedly connected to the valve body 1 by screws, and in other embodiments, the injection molding part may also be fixedly connected by bolts or the like. The stator assembly 42 is used as the insert injection molding to form the injection molding part 6, which is beneficial to the limit of the stator assembly 42, in other embodiments, the stator assembly 42 may not be fixed by injection molding, but the stator assembly 42 is limited by arranging a limit structure on the electric valve.

With reference to fig. 2 and 7, in the present embodiment, the injection part 6 includes a first injection part 61 and a second injection part 62, in the present embodiment, the first injection part 61 and the second injection part 62 are integrally formed, which can facilitate processing, and of course, in other embodiments, the first injection part 61 and the second injection part 62 can be separately formed and then fixedly connected. The injection molding part 6 further comprises a first accommodating cavity 63 and a second accommodating cavity 64, the first accommodating cavity 63 is located in the first injection molding part 61, the second accommodating cavity 64 is located in the second injection molding part 62, part of the rotor assembly 41 is located in the first accommodating cavity 63, and the electric control plate 5 is located in the second accommodating cavity 64. In this embodiment, the injection part 5 further includes a partition part 65, the partition part 65 is located between the first accommodation cavity 63 and the second accommodation cavity 64, and the partition part 65 partitions the first accommodation cavity 63 and the second accommodation cavity 64.

Referring to fig. 2 to 8, the position detection sensor 81 is located on the outer side in the radial direction of the rotor 411, and in the present embodiment, at least a part of the position detection sensor 8 is located on the outer side in the radial direction of the end of the rotor 411 close to the valve body 1. The first injection molding part 61 has a containing part 611, the containing part 611 is located on a peripheral side wall of the first containing cavity 63, in this embodiment, the containing part 611 is located on one end, close to the valve body 1, of the peripheral side wall of the first containing cavity 63, and with reference to fig. 7-8, in this embodiment, the containing part 611 includes a bottom wall 6111 and side walls, and the side walls include a first side wall 6112, a second side wall 6113, a third side wall 6114 and a fourth side wall 6115, wherein the first side wall 6112 is close to a side where the rotor 411 is located, the second side wall 6113 is arranged opposite to the first side wall 6112, the third side wall 6114 and the fourth side wall 6115 are arranged opposite to each other, and the first side wall 6112, the second side wall 6113, the third side wall 6114 and the fourth side wall 6115 are all higher than a plane where the bottom wall 61. At least part of the position detection device 8 is located in the accommodating portion 611, the position detection device 8 abuts against the bottom wall 6111, the accommodating portion 611 can limit the position detection device 8, and the first side wall 6112 can limit the position detection device 8 from coming off in the direction of the rotor 411. Of course, in other embodiments, the position detection device 8 and the accommodating portion 611 may be fixed by a tight fit.

With reference to fig. 2-9, in a first embodiment of the present invention, the position detecting sensor 81 is electrically and/or signal-connected to the electronic control board 5 through the connecting member 9. In this embodiment, the connecting member 9 is a rigid connecting member, and includes a rigid circuit board, the connecting member 9 and the electric control board 5 are formed separately, and the connecting member 9 is formed separately. The partition portion 65 of the injection molding portion 6 has a notch portion 651, the notch portion 651 is located in a direction in which the second sidewall 6113 of the accommodating portion 611 is located, the notch portion 651 is communicated with the accommodating portion 611, a width of the notch portion 651 is smaller than a width between the third sidewall 6114 and the fourth sidewall 6115 of the accommodating portion 611, and a part of the connecting member 9 is located in the notch portion 651. In this embodiment, the connector 9 is in a strip shape, the connector 9 includes a first portion 91, a second portion 92 and a third portion 93, the connector 9 includes a first group of pads 94 and a second group of pads 95, the first group of pads 94 is located in the first portion 91 of the connector 9, the second group of pads 95 is located in the third portion 93 of the connector 9, the first portion 91 extends into the second accommodating cavity 64, a part of the second portion 92 is located in the notch portion 651, and the third portion 93 is located in the accommodating portion 611; in this embodiment, the widths of the first portion 91 and the second portion 92 are the same, the width of the third portion 93 is greater than the width of the second portion 92, the width of the second portion 92 matches the width of the notch portion 651, the width of the second portion 92 is slightly smaller than the width of the notch portion 651, at least a part of the second portion 92 abuts against the side wall of the notch portion 651, and the connector 9 is not easily removed from the notch portion 651; the width of the third portion 93 is larger than that of the notch portion 651, and the movement of the link 9 in a direction away from the rotor 411 can be restricted. In this embodiment, the number of the first group of pads 94 and the second group of pads 95 is 3, and the pads on the first group of pads 94 are electrically connected to the corresponding pads on the second group of pads 95. The position detection sensor 81 comprises a first group of pins 812, the electronic control board 5 comprises a second group of pins 51, the first group of pins 812 of the position detection sensor 81 is welded and fixed with a second group of pads 95 of the connecting component 9, the second group of pins 51 of the electronic control board 5 is welded and fixed with a first group of pads 94 of the connecting component 9, the position detection sensor 81 is electrically and/or signal-connected with the electronic control board 5 through the connecting component 9, the position detection device 8 can be further fixed after the first group of pins 812 of the position detection sensor 81 is welded with the second group of pads 95 of the connecting component 9, of course, in other embodiments, the second group of pins 51 of the electronic control board 5 may have fisheye pins, and the second group of pins 51 is fixed with the connecting component 9 through pressure-Fit (Press-Fit). The third portion 93 is further provided with a limiting hole 931, the number of the limiting holes 931 is 2, and the limiting holes 931 are matched with the limiting columns 824 on the fixing portion 82 of the position detection device 8, so that the position detection device 8 can be further limited. In this embodiment, the horizontal position of the electronic control board 5 has a certain height difference in the vertical direction with respect to the position of the main body 811 after the position detection sensor 81 is installed, and the rigid connecting member can facilitate the connection between the position detection sensor 81 and the electronic control board 5 without being limited by the height difference between the position detection sensor 81 and the installation position of the electronic control board 5, which is beneficial to improving the reliability of the connection. In this embodiment, the filter circuit is disposed on the connecting member 9, which can further improve the stability of the output signal of the position detecting sensor 81.

Referring to fig. 13, in the second embodiment of the present invention, the connecting member 9a is a flexible printed circuit, the connecting member 9a and the electric control board 5 are formed separately, and the connecting member 9a is formed separately. The partition portion 65 of the injection molded portion 6 has a notch portion 651a, and the partial link 9a is located in the notch portion 651 a. In this embodiment, the connecting member 9a is in a strip shape, the connecting member 9a includes a first connecting portion 91a and a second connecting portion 92a, the connecting member 9a includes a first group of pads and a second group of pads, the first group of pads is located at the first connecting portion 91a, the second group of pads is located at the second connecting portion 92a, the first connecting portion 91a extends into the second accommodating cavity 64, a portion of the second connecting portion 92a is located at the notch portion 651a, and a portion of the second connecting portion 92a is located at the accommodating portion 611 a. In this embodiment, the number of the pads of the first group of pads and the second group of pads is 3, and the pads of the first group of pads are electrically connected with the corresponding pads of the second group of pads respectively. The first group of pins 812 of the position detection sensor 81 is welded and fixed with the second group of pads of the connecting part 9a, the second group of pins 51 of the electronic control board 5 is welded and fixed with the first group of pads of the connecting part 9a, and the position detection sensor 81 is electrically and/or signal-connected with the electronic control board 5 through the connecting part 9 a. In this embodiment, the horizontal position of the electronic control board 5 has a certain height difference in the vertical direction with respect to the position of the main body 811 after the position detection sensor 81 is installed, and the flexible circuit board is used as the connecting member to facilitate the connection between the position detection sensor 81 and the electronic control board 5 without being limited by the height difference between the position detection sensor 81 and the installation position of the electronic control board 5, which is beneficial to improving the reliability of the connection, and meanwhile, the flexible circuit board is used as the connecting member to facilitate the improvement of the reliability of the welding position.

Referring to fig. 14, in a third embodiment of the electric valve, the connector 9b is a flexible connector, the flexible connector includes a conductive wire, such as a flat cable, one end of the conductive wire is electrically connected to the electric control board 5, the other end of the conductive wire is electrically connected to the first group of pins 812 of the position detection sensor 81, the specific conductive wire includes a first portion 91b, a second portion 92b and a third portion 93b, the first portion 91b extends into the second receiving cavity 64, a portion of the second portion 92b is located in the notch portion 651b, and a portion of the third portion 93b is located in the receiving portion 611 b. In this embodiment, the position detection device 8 is fixed in the accommodating portion 611b, the first portion 91b is fixed and electrically connected to the pad provided on the electronic control board 5 by soldering, and the third portion 93b is fixed and electrically connected to the first group of pins 812 of the position detection sensor 81 by soldering or winding. Of course, in other embodiments, the notch portion may not be provided. The use of wires as the connecting members facilitates the connection of the position detecting sensor 81 to the electronic control board 5.

With reference to fig. 15-16, a fourth embodiment of the electric valve is different from the above embodiments in that the length of the first sensor 7 is small, the horizontal position where the electric control board 5 is installed is substantially on the same horizontal plane as the end surface of the main body 811 leading out the first set of pins 812 after the position detection sensor 81 is installed, in this embodiment, the electric control board 5 includes a main portion 52 and an extended portion 53, the extended portion 53 is disposed to protrude from the main portion 52 toward the rotor 411, a part of the extended portion 53 is located at the notch 651c, one end of the extended portion 53 is connected to the main portion 52, the other end extends to the notch 651c, one end of the extended portion 53 away from the main portion 52 is provided with a first set of pads, and the first set of pins 812 of the position detection sensor 81 is welded and fixed. In this embodiment, the position detection device 8 is mounted on the accommodating portion 611c, the accommodating portion 611c can limit the position detection device 8, and the first group of pins 812 of the position detection sensor 81 can further fix the position detection device 8 after being welded to the electronic control board 5. One end of the extending portion 53, which is far from the main portion 52 of the electronic control board 5, may be provided with 2 limiting holes, and the limiting holes may be matched with the limiting posts 824 on the fixing portion 82 of the position detection device 8, so as to further limit the position detection device 8. The electric control board 5 is provided with the extension part 53, so that the position detection sensor 81 can be conveniently connected with the electric control board 5, and the connection reliability can be improved. In other embodiments, a patch type position detection sensor may be adopted, the position detection sensor is fixed to the adapter circuit board by welding, and the adapter circuit board is then fixed to the electronic control board by welding or clamping.

Referring to fig. 17, in a fifth embodiment of the electric valve, the connecting part 9d includes a metal wire, in this embodiment, the connecting part 9d is a metal wire, and of course, in other embodiments, the connecting part may also be an enameled wire or the like. The number of the metal wires 9d is 3, and one of the metal wires is taken as an example for explanation, the metal wire 9d includes a first connecting section 91d, an intermediate section 92d and a second connecting section 93d, and a part of the connecting member 9d is fixed inside the injection molding part 6 by injection molding. In this embodiment, the first connecting section 91d is fixed and electrically connected with the first group of pins 812 of the position detecting sensor 81 by welding or winding, the second connecting section 93d is fixed with the electric control board 5 by welding, and the metal wire is used as a connecting piece, so that the position detecting sensor 81 can be conveniently connected with the electric control board 5, and the connection reliability can be improved.

The electric valve comprises a first sensor 7 and a position detection sensor 81, the first sensor 7 can detect the temperature and/or the pressure of the working medium 13 in the second cavity, the position detection sensor 81 can sense the rotation of the rotor 411 and obtain a feedback signal, and a control unit on the electric control plate 5 collects the feedback signal and judges the running state of the electric valve by combining the feedback signal; therefore, the electric valve can obtain the temperature and/or pressure of the working medium in the second cavity 13 and the feedback signal of the rotor state, and the control precision of the electric valve is favorably improved, and the reliability of the system is favorably improved.

It should be noted that: the above embodiments are only used for illustrating the present invention and not for limiting the technical solutions described in the present invention, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solutions and modifications thereof without departing from the spirit and scope of the present invention can be modified or replaced by other technical solutions and modifications by those skilled in the art.

Claims

1. An electrically operated valve comprises a valve body, a valve seat assembly, a valve core, a rotor assembly, a stator assembly, an injection molding part and an electric control plate, wherein the injection molding part is provided with an inner cavity, the electric control plate is positioned in the inner cavity of the injection molding part, the valve seat assembly is provided with a valve port, the rotor assembly comprises a rotor, the stator assembly is positioned at the periphery of the rotor assembly, the stator assembly is electrically connected with the electric control plate, the rotor assembly can drive the valve core to move, the valve core can move relative to the valve port and adjust the opening degree of the valve port, and the electrically operated: the valve body having a first cavity in which at least a portion of the valve seat assembly is located, the electrically operated valve further comprising a first sensor, the valve body is also provided with a second cavity, at least part of the first sensor is positioned in the second cavity, the first sensor is positioned on one side of the electric control board close to the valve body, the first sensor is electrically and/or signally connected with the electric control board, the first sensor can detect the temperature and/or the pressure of the working medium in the second cavity, the electric valve further comprises position detection means located radially outside the rotor, the position detection device is limited by the injection molding part and comprises a position detection sensor, the position detection sensor can sense the rotation of the rotor and form a feedback signal, and the control unit on the electric control board acquires the feedback signal and judges the running state of the electric valve through the feedback signal.

2. Electrically operated valve according to claim 1, characterized in that: the electric valve also comprises a connecting piece, and the electric control board is electrically and/or signal-connected with the position detection sensor through the connecting piece.

3. Electrically operated valve according to claim 2, characterized in that: the position detection sensor comprises a body part and a first group of contact pins, the first group of contact pins are electrically connected with the electric control board, the electric valve further comprises a second group of contact pins, the first group of contact pins are welded and fixed with the connecting piece, and the second group of contact pins are welded and fixed with the connecting piece.

4. An electrically operated valve according to claim 3, characterised in that: the connecting piece is a rigid connecting piece, the rigid connecting piece comprises a first group of bonding pads and a second group of bonding pads, and the bonding pads on the first group of bonding pads are electrically connected with the corresponding bonding pads on the second group of bonding pads; the first group of contact pins and the second group of bonding pads are welded and fixed, and the second group of contact pins and the first group of bonding pads are welded and fixed.

5. Electrically operated valve according to claim 2, characterized in that: the connecting piece is a flexible connecting piece, the position detection sensor comprises a body part and a first group of contact pins, the first group of contact pins are electrically connected with the electric control board, the flexible connecting piece comprises a lead, one end of the lead is electrically connected with the electric control board, and the other end of the lead is electrically connected with the first group of contact pins.

6. Electrically operated valve according to claim 1, characterized in that: the electric control board comprises a main portion and an extending portion, the extending portion protrudes from the main portion to the direction where the rotor is located, one end of the extending portion is connected with the main portion, the other end of the extending portion extends to the outer side of the rotor, a first group of bonding pads are arranged at one end, far away from the main portion, of the extending portion, the position detection sensor comprises a main portion and a first group of contact pins, the first group of contact pins are electrically connected with the electric control board, and the first group of contact pins are welded and fixed with the first group of bonding pads.

7. Electrically operated valve according to any of claims 3-5, characterized in that: the injection molding part is provided with a first accommodating cavity and a second accommodating cavity, part of the rotor assembly is located in the first accommodating cavity, the electric control plate is located in the second accommodating cavity, the injection molding part comprises a separating part, the separating part is located between the first accommodating cavity and the second accommodating cavity, the separating part comprises a notch part, the depth of the notch part is smaller than that of the second accommodating cavity, and part of the connecting piece is accommodated in the notch part.

8. Electrically operated valve according to claim 6, characterized in that: the injection molding part is provided with a first accommodating cavity and a second accommodating cavity, part of the rotor assembly is located in the first accommodating cavity, the electric control plate is located in the second accommodating cavity, the injection molding part comprises a separating part, the separating part is located between the first accommodating cavity and the second accommodating cavity, the separating part comprises a notch part, the depth of the notch part is smaller than that of the second accommodating cavity, and part of the extending part is accommodated in the notch part.

9. Electrically operated valve according to claim 7, characterized in that: the injection molding part further comprises an accommodating part, the position detection device further comprises a fixing part, and the fixing part comprises a fixing part main body, a mounting groove and a through hole; the body part is accommodated in the mounting groove, the body part is tightly matched with the inner wall of the fixing part main body, the first group of contact pins penetrate through the through hole, the accommodating part comprises a first side wall and a second side wall, and the first side wall and the second side wall limit the fixing part main body; part the connecting piece stretches into the second holds the chamber, and part the connecting piece is located breach portion, and part the connecting piece is located the portion of holding.

10. Electrically operated valve according to claim 9, characterized in that: the accommodating part comprises a bottom wall and a side wall, the side wall comprises the first side wall, the first side wall is close to one side where the rotor is located, the first side wall is higher than the plane where the bottom wall is located, the position detection device is abutted to the bottom wall, and the first side wall prevents the position detection device from coming off in the direction where the rotor is located.